The interest rate can be calculated using the simple interest formula:
Interest = Principal x Rate x Time
In this case, the principal (P) is 7,090, the time (t) is 3 months, and the interest (I) is 7,267.25 - 7,090 = 177.25.
Now, let's solve for the interest rate (r):
r = I / (P x t)
r = 177.25 / (7,090 x 3/12)
r = 0.0075
So, the interest rate is 0.75% or 75 basis points.